The cheaper modules rated 1333 MHz would be the better choice due to their low price.
Assuming the modules are compatible with the laptop (as per the above list), the only compatibility issue that may occur is when using two (or more) of the same modules at the same time, regardless of memory frequency.
Each module has unique characteristics, no two modules are exactly alike, even for modules with the same part number. In order for two or more modules to work together, the modules characteristics have to be identical or close enough to each other to allow compatible stable operation.
So when using several single modules at the same time, it might take several attempts using different modules (with the same part number) to find the...